The Michael addition of lithium 1, 3-dien-2-olates with α, β-unsaturated carbonyl compounds is described. With α, β-unsaturated esters the reaction was reversible even at− 78° C, while kinetically controlled with α, β-unsaturated ketones or alkylidenemalonates. At room temperature, the initially formed Michael adducts undergo subsequent intramolecular Michael addition to give substituted cyclohexanone derivatives in a highly stereoselective ...
